COMPARATIVE STUDY OF COOLMOS AND MOSFET FOR HIGH FREQUENCY INVERTER DESIGN

In this project, effectiveness performances ofCOOLMOS and MOSFET switches in a
single phase full bridge high frequency inverter circuit are investigated and compared
in terms of output voltage and current waveform, switching losses and efficiency of
the circuit catering for Uninterruptible Power Supply (UPS) system. Recently,
semiconductor field came out with the latest technology of MOSFET family known
as COOLMOS which is specified by the manufacturers to have lower switching
losses with greater efficiency at lower cost. Therefore, the superior performances of
COOLMOS over MOSFET in a single phase full bridge high frequency inverter
design for UPS application are to be verified. The project is executed using
simulation in the Cadence PSpice 14.2 software as well as by experimentation onthe
Printed Circuit Board (PCB) layout. The layout of inverter circuit configuration is
designed by using Multisim and transferred to the Ultiboard 2001 software. The
simulation outcomes are confirmed to be as per theoretical study before comparing
them with the experimentation results. From the simulation investigation of both
switches, COOLMOS indicates better performances by having switching energy
losses are reduced up to more than 50% compared to MOSFET and able to cater for
high voltage application. Consequently from the experimentation the PCB layout,
COOLMOS is validated to have superior performances compared to MOSFET in
terms of experiencing lowerswitching energy losses.